Premise:
Forgive me if I make some mistakes, English is not my first tongue.
Suggestions for creators:
The hypocrite trait is really too rare, I've found it only once in hundreds of interrogations.
You should add a Unique Winkles counter in Statistics.
There're 4 different categories of cases (murder, theft, conspiracy and fraud), but they don't bring anything extra in the dynamics of the game; I think this is an untapped potential.
Criticism:
These Illuminati things everywhere nowadays are becoming quite annoying, this is why I didn't give a higher rating. Sorry for that, but I prefer to be honest.
Tips for players:
As the second reviewer below me explained a strategy very similar to that I used for myself, I'll just add some extra tips.
1) Try to get as many zero question resolved cases as possible at the beginning, within a streak of 2-3, because you could be more reckless than when you've a higher streak. Why it's important? You'll gain 6 AP for every zero question case solved. Why it's important to do at the beginning? Higher the streak, higher number of location available and higher number of suspected Winkles, lower possibility to solve the case without questioning someone. It's the best way to get rapidly Man of Action Medal. Consider that with this shrewdness I reached the final promotion (streak of 31) with 42 AP.
2) After questioning 3 Winkles you get 3 clues (facial hair, vest and hat). Worst case: if all of them have the red label the guilty Winkle does have none of the 3. Best case: if 1 has a yellow label and others have the red label than the guilty Winkle has for sure the clue with the yellow label. Other 2 cases: if the clues with yellow labels are 2 or 3 than ONE AND ONLY ONE of them will be possessed by the guilty Winkle. It's good to keep that in mind, with higher streak will be of great help to save AP.
3) Sometimes you can find some extra AP scattered around the map. If you don't question any Winkle, abandoning the case will not disrupt the streak. Just put two and two together. ;)
But don't try to cheat: if you abandon the case after picking one or more APs on the map, you'll lose it/them; plus keep in mind that, even if you find the extra APs, the case could be more difficult than another one without them, so you should evaluate as well the eye witness informations.
4) If I didn't miscalculated (In-game Random Encounters medal unlocked but NG's counterpart not, I've to "investigate" why), the Unique Winkles are 7. They're quite rare and they could appear any time everywhere, but they're easy to recognize so I'll not spoil to you anything about them.